Women will have leucorrhea before menstruation, and the amount of leucorrhea will even increase because the mucus at the cervix will secrete vigorously before menstruation, and the opening of the cervix will gradually dilate, and the cervical mucus will flow out mixed with the shed vaginal epithelial cells. At this time, just observe the leucorrhoea, the normal leucorrhoea is transparent and thin, no odor. Also pay attention to private care, sexual hygiene, underwear cotton, comfortable and breathable. Some women tend to calculate and estimate their period time based on the time of increased leucorrhea, which is not an accurate practice but can be referred to. If you find that the amount of leucorrhea and yellow, or even odor with vulvar itching discomfort and other symptoms, it is recommended to go to the hospital for examination, the best according to the results of the examination to target the use of drugs, it is not recommended to buy their own drugs or even try many types of drugs on their own. Unless the symptoms are very typical, it is also necessary to consult a specialist before using medication, otherwise it will not only fail to cure but also aggravate vaginal inflammation.